目的调查甘肃省兰州市城关区低档场所女性商业性性服务人员(female sex worker,FSW)人群的性病/艾滋病感染情况、相关危险行为和求医行为,为制定干预措施和评估FSW人群的求医行为对疫情报告的影响提供依据。方法采取整群抽样方法,对城...目的调查甘肃省兰州市城关区低档场所女性商业性性服务人员(female sex worker,FSW)人群的性病/艾滋病感染情况、相关危险行为和求医行为,为制定干预措施和评估FSW人群的求医行为对疫情报告的影响提供依据。方法采取整群抽样方法,对城关区低档娱乐场所的300名FSW开展一对一的人口学特征、性病感染的风险意识、求医行为和求医意向等问卷调查,同时进行HIV、梅毒、淋球菌、HSV-2和生殖道沙眼衣原体感染检测。结果 300名FSW艾滋病相关知识知晓率为41.00%;最近一次性服务安全套使用率75.00%,最近一个月性服务每次使用安全套率为61.67%,有时使用为35.00%,从未使用为3.33%;性病(STDs)阳性检出率34.33%,沙眼衣原体14.67%、梅毒14.00%、淋球菌5.67%。结论兰州市城关区低档FSW性病/艾滋病防治知识知晓率、安全套使用率和自我防护意识普遍较低,STDs患病率比较高,说明低档场所FSW更易受到性病和艾滋病威胁;提示今后针对FSW开展综合干预工作时,应将低档场所FSW列为重点宣传干预对象。展开更多
The vortex interference mechanism on low Reynolds number between the canard and main wing of the canard-forward sweep wing （Canard-FSW） configurations is simulated numerically by employing the numerical wind tunnel ...The vortex interference mechanism on low Reynolds number between the canard and main wing of the canard-forward sweep wing （Canard-FSW） configurations is simulated numerically by employing the numerical wind tunnel method. The variations of aerodynamic characteristics of Canard-FSW configurations with different positions of the canard are investigated,finding that the aerodynamic interference and mutual coupling effect between the canard and main wing have made great contributions to the lift and stability characteristics of the whole aircraft. Canard can radically improve the surface flow pattern of the main wing. And its own vortex can have a favorable interference on the main wing and can effectively control the airflow boundary layer separation. At small angles of attack,the aerodynamic characteristics are sensitive to the positions of the canard and the main wing,but at high angles of attack,the aerodynamic performances of the configuration are not only related to the shape of the canard （forward or backward）,but also with the size of control force as well as the features of the vortices generated above the main wing and the canard. The different configurations and vortices are illustrated using the velocity vector,streamlines and pressure contours.展开更多
文摘目的调查甘肃省兰州市城关区低档场所女性商业性性服务人员(female sex worker,FSW)人群的性病/艾滋病感染情况、相关危险行为和求医行为,为制定干预措施和评估FSW人群的求医行为对疫情报告的影响提供依据。方法采取整群抽样方法,对城关区低档娱乐场所的300名FSW开展一对一的人口学特征、性病感染的风险意识、求医行为和求医意向等问卷调查,同时进行HIV、梅毒、淋球菌、HSV-2和生殖道沙眼衣原体感染检测。结果 300名FSW艾滋病相关知识知晓率为41.00%;最近一次性服务安全套使用率75.00%,最近一个月性服务每次使用安全套率为61.67%,有时使用为35.00%,从未使用为3.33%;性病(STDs)阳性检出率34.33%,沙眼衣原体14.67%、梅毒14.00%、淋球菌5.67%。结论兰州市城关区低档FSW性病/艾滋病防治知识知晓率、安全套使用率和自我防护意识普遍较低,STDs患病率比较高,说明低档场所FSW更易受到性病和艾滋病威胁;提示今后针对FSW开展综合干预工作时,应将低档场所FSW列为重点宣传干预对象。
基金National Defense Basic Research Program (B222006060)
文摘The vortex interference mechanism on low Reynolds number between the canard and main wing of the canard-forward sweep wing （Canard-FSW） configurations is simulated numerically by employing the numerical wind tunnel method. The variations of aerodynamic characteristics of Canard-FSW configurations with different positions of the canard are investigated,finding that the aerodynamic interference and mutual coupling effect between the canard and main wing have made great contributions to the lift and stability characteristics of the whole aircraft. Canard can radically improve the surface flow pattern of the main wing. And its own vortex can have a favorable interference on the main wing and can effectively control the airflow boundary layer separation. At small angles of attack,the aerodynamic characteristics are sensitive to the positions of the canard and the main wing,but at high angles of attack,the aerodynamic performances of the configuration are not only related to the shape of the canard （forward or backward）,but also with the size of control force as well as the features of the vortices generated above the main wing and the canard. The different configurations and vortices are illustrated using the velocity vector,streamlines and pressure contours.
